THE GEOGRAPHY OF TRANSPORT SYSTEMS
Number of Cycles
The matrix below shows the number of cycles (u) for each graph on the above figure. Graph A has no cycles (u=0) while graphs C and D have two cycles respectively.
| e | v | p | u | |
| A | 3 | 5 | 2 | 0 |
| B | 5 | 5 | 1 | 1 |
| C | 5 | 4 | 1 | 2 |
| D | 7 | 6 | 1 | 2 |